I have an old version of adobe flash that adobe is blocking. How do i unblock it?

It has been blocked since the update on May 23. The update says that it will affect:

All Firefox users who have a version of the Flash Player Plugin older than 10.2.159.1.

However it also says:

This is not an ordinary block. It's just an upgrade notification that will be shown to all users who have these old versions installed, asking them to download the latest version. If they choose to ignore the notification, the plugin will continue to work normally.

My computer is too old to be able to download a newer version. Flash is blocked by Adobe even though they say that, "If they choose to ignore the notification, the plugin will continue to work normally."

So apparently Adobe automatically blocked this, but say it will continue to work normally.